NA61/SHINE Hadron Production Measurements for Improving the Accuracy of Neutrino Flux Estimation in T2K

Accurate knowledge of neutrino flux is crucial for determining neutrino oscillation parameters and cross sections using accelerator-generated neutrino beams. Hadron production is a dominant source of neutrino flux uncertainty in long-baseline neutrino experiments, such as T2K and Hyper-K in the future. These uncertainties are reduced by evaluating hadron-nucleus interactions in the target materials used to create neutrino beamlines. The NA61/SHINE experiment at CERN has a dedicated program to precisely measure these processes, providing essential data to reduce flux uncertainties for neutrino oscillation measurements. This presentation will discuss measurements of hadron production in thin and replica targets.